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XCode has a number of built-in variables that are used for convenience in Build Settings, for example "$(PRODUCT_NAME)" or "$(CURRENT_ARCH)".

Can I define my own variables? How / where?

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4 Answers 4

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127

In XCode 5 this has changed slightly.

  1. Select the project or target in the left side of the editor
  2. Go to the Editor menu in the top menu bar
  3. Select "Add Build Setting" and then "Add User-Defined Build Setting"

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is there any way to add a user defined build settings which can select a value from set of predefined values
When the selections are grayed out (like in the image above), you need to select the Project from the "Project and Target" list, then click the "Build Settings" tab, as specified in this SO question and answer: stackoverflow.com/questions/19842746/…
@Johnykutty this may be useful blog.xebia.com/2015/01/30/…
Can this be considered a kind of Obfuscation?
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It's at the top of the build settings panel in Xcode 10.

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13

Create a user-defined build setting. To create one in Xcode 4 select your project from the project navigator to open the project editor. Select your project or target from the left side of the editor. Click the Build Settings button at the top of the editor. Click the Add Build Setting button at the bottom of the editor and choose Add User-Defined Setting.

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The original accepted answer, back in Xcode 4 days.
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User-defined setting can be added in Xcode as specified below:

Xcode 4.x :

Select PROJECT / TARGETS -> “Add Build Setting” (option present in bottom-right corner of Xcode) -> “Add User-Defined Setting”

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Xcode 5.x :

Select PROJECT / TARGETS -> Editor menu -> “Add Build Setting“ -> “Add User-Defined Setting”

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This will add User-defined setting. Enter key-value for setting.

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3 Comments

is there any way to add a user defined build settings which can select a value from set of predefined values
yes, there is a way to define values to preprocessor variables in build settings, which can be accessed from code. Goto "Apple LLVM - Preprocessing" section in Build Settings of your project and you can add variables like LOGGING=1 and which can be accessed from code as #if LOGGING.
It seems that on Xcode 12.5, the Editor menu doesn't work, but the top-right add button next to search bar does now.

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